Automatic safety stop-motion



(No Model.)

7 A. 0. & A. F. DUMKE.

AUTOMATIU SAFETY STOP MOTION.

.No. 331,689. Patented Dec. 1, 1885.

JNIT HESSEE: 1&4

UNITED STATES PATENT 'FFlCEt AUGUST 0. DUMKE AND AUGUST F. DUMKE, OFMANITOXVO G, WISCONSIN.

AUTOMATIC SAFETY STOP-MOTION.

SPECIFICATIGN forming part of Letters Patent No. 331,689. datedDecember 1. 1885.

Application filed July 31, 1885. Serial No. 113,187. (No model.)

To all whom it may concern: box, and pivoted in the bottom and top por-Be it known that we, AUGUST C. DUMKE tions of the frame-like casting orbase aof the and AUGUST F. DUMKE, citizens of the United standard B. Theupper arm, I), of the band- States of America, residing at Manitowoc, inwheel or pulley shaft-box Z1 is provided with 55 5 the county ofManitowoc and State of \Visan inwardly curved or extended arm, d,uponcousin, have invented certain new and useful the free end of which issupported the lower Improvementsin Automatic Safety Stop-Moend of thearm or extension 0 of the sleeve tions, of which the following is aspecification, A when the latter is in its elevated normal referencebeing had therein to the accompaposition. The driving-pulley orband-wheel 6o 10 nying drawings. 1 has its shaft, as usual, geared, asshown at f, This invention has for its object to at once to thegovernor-shaft. The driving-belt is and automatically arrest the actionof the enpassed over the driving-pulley or band-wheel gine in the eventof the breaking of the drivin the direction shown in Fig. l, and when ining-belt or its slipping off its pulley or wheel; operation thedriving-pulley assumes the po- 65 r 5 and the invention consists of thecombinations sition shown in Fig. 4, and in the event of the of parts,including their construction, subst-an breaking or slipping 0d of saiddriving-belt tially as hereinafter described and claimed. from itspulley the latter, together with its In the accompanying drawings,Figure 1 is a connected parts, will automatically move latside elevationof our improved automatic stop erally into the position indicated bydotted or cut-off for engines. Fig. 2 is a similar elelines in said Fig.4. When the driving-belt vation taken at right angles to the plane of isapplied as above stated, the inward move- Fig. 1, with the parts shownas tripped. Fig. ment of the arm cl is regulated by reason oi 3 is alsoa view in elevation of the same, but its contact near its inner end witha down- -taken from the same side of Fig. 1, also with wardly-extendedprojection of the frame-like 7 5 the parts shown as tripped; and Fig. 4is an casting or base a, or it may be with the casing enlarged detailview. of the governor-shaft, and when thus held its In the embodiment ofour invention we emouter end is in a plane directly in under the ploy avertically-sliding sleeve, A, in connecend of the conical shaft 0. tionwith the usual valve-tripping mechanism, In operation it will beobserved that when So comprising the valve-tripping rods K, the thevertically-sliding sleeve A is raised, and walking-beam orcentrally-pivoted lever the driving-belt applied to the drivingpulley e,the shaft e, having an arm, or, and the rod or band-wheel, the inwardlycurved or ex- 01., connected to the governor. The sliding tended arm (Iof the upper arm, b, of the pulsleeve A is supported upon the standard13, ley shaft-box will be in such a position as to mounted upon theframe-like casting or base receive the end of the arm or extension 0 ona, and has a boxing, A, cast upon one side to its upper surface, and inthe event of the belt support the shaft e. In the opposite side ofbreaking or itsslipping off the pulley or wheel said sleeve is avertical slot, 71, through which G the weight of the sliding sleeve A,bearis passed a headed screw or stop, it, to limit ing upon theshaft-box of said pulley or wheel 0 0 the vertical movement of thesleeve, and to out of the plane of its center of gravity, will preventlateral movement or displacement. have the effect to move said shaft-boxwith From the lower end of the sliding sleeve A, the pulley or wheellaterally,which movement preferably on the side carrying the shaft e, ofsaid shaft-box will permit the slipping of depends an arm, 0, which is'ofi'set from the the extension 0 off the arm at, and the conse- 9 3 5sleeve, and pointed or made conical at its quent downward movement ordescent of the lower end, the function of which will appear slidingsleeve, which will cause the rocking of further on. the lever e, whichwill act through the rods G is the driving-pulley or band-wheel,with Kto close the steam-valves, thus shutting off its shaft-box b,cast withtwo arms, I), branchthe steam from the piston-cylinder, and stop- :00 5oing therefrom in asubstantially vertical plane, ping the action of theengine.

being slightly curved away from the shaft- From the foregoing it will beseen that the usual governor mechanism for tripping the steam-valves ineffecting the proper feeding of the steam to the piston-cylinder isutilized to also aid in tripping the steam-valves to stop the action ofthe engine, as stated, in the event of accident to the drivingbelt.Besides, it will be seen that the action of the parts is automatic andinstantaneous, insuring perfect immunity from further or seriousaccident, as might'otherwise occur.

Having thus fully described our invention, what we claim, and desire tosecure by Letters Patent, is+

1. In avalve-cut-off mechanism, the sliding sleeve carrying the shaftoperating the valvetripping rods, and having an extension or arm restingupon a lateral'arm of the pivoted support of the driving-wheel orpulley-shaft, substantially as and for the purpose set forth.

2. In a valve cutoff mechanism, the slotted sliding sleeve engaged byastop and carrying the shaft operating the valve-tripping rods, saidsleeve having a pendent arm or extension with a tapered or conical lowerend and resting upon a lateral arm of the pivoted shaftboX extensions ofthe driving wheel or pulley,

- substantially as and for the purpose specified.

3. In a governor-valve cut-off, the drivingpulley or band-wheel havingits shaft-box provided with two arms, one of said arms having aninwardly curved or extended arm for supporting a pendent arm orextension, and pivoted by said arms to permit of the automatic lateralmovement of the pulley in the event of the slipping or breaking of thedriving-belt, substantially as, shown and described. I

4. In a governor-valve cut-off, the combination, with the sliding sleevehaving a depending arm, and the valve-operating rods,

the said sliding sleeve carrying the shaft of 40 the said"alve-operating rods, of the drivingpulley having its shaft-box providedwith two arms, one of said arms having an inwardly curved or extendedarm, and said arms being

